Coal-burning power plants produce more than half of the electricity in the U.S., and they generate huge amounts of coal ash in the process. One type of coal ash is a fine, powdery particle called fly ash, which for many years ...

Environmental groups said in court Monday that the Tennessee Valley Authority is essentially storing toxic ash from an aging Tennessee coal-fired power plant in a colander, letting pollutants seep into a major river in violation ...

Researchers have now found an explanation for what triggered the largest volcanic eruption witnessed by mankind. The volcano's secret was revealed by geochemical clues hidden inside volcanic quartz crystals.

When NASA's Terra satellite passed over Alaska's erupting Bogoslof Volcano the MODIS instrument aboard captured an image of a large ash plume surrounded by clouds making it appear to be wrapped in white.